When Uber announced on 18 August that it would let the public hail self-driving taxis in Pittsburgh before the end of the month, some autonomous vehicle experts could not believe it was happening so soon.

Global stock markets lost about $2 trillion in value on Friday after Britain voted to leave the European Union, while sterling suffered a record one-day plunge to a 31-year low and money poured into safe-haven gold and government bonds.

When Uber announced on 18 August that it would let the public hail self-driving taxis in Pittsburgh before the end of the month, some autonomous vehicle experts could not believe it was happening so soon.

When Uber announced on 18 August that it would let the public hail self-driving taxis in Pittsburgh before the end of the month, some autonomous vehicle experts could not believe it was happening so soon.

When Uber announced on 18 August that it would let the public hail self-driving taxis in Pittsburgh before the end of the month, some autonomous vehicle experts could not believe it was happening so soon.

When Uber announced on 18 August that it would let the public hail self-driving taxis in Pittsburgh before the end of the month, some autonomous vehicle experts could not believe it was happening so soon.